Advances in Artificial Intelligence: Selected Papers from the Annual Conference of Japanese Society of Artificial Intelligence (JSAI 2019) - Ohsawa, Yukio; Abe, Akinori; Ito, Takayuki; Matsumura, Naohiro; Mori, Junichiro; Sato-Shimokawara, Eri; Takama, Yasufumi; Yada, Katsutoshi (Springer International Publishing, 2020)